Introduction

In the past 50 years, all kinds of music in the world have made great progress, of which the development of rock music is the most representative. I will show the development and change of world music through the analysis of the change of rock music in this project.

An overall analysis of every genre of music

I count and chart the number of songs of all music types over the past 50 years.

We can find out in above two graphics that Rock music counts 51.6 percent of total number of songs of every genre in the last 50 years. For this reason, I decide to only analyze Rock music because I think this kind of music can better show us the real history and development of music in the last 50 years.

Basic information of rock music

I will show you the overall information of rock music about what is the high frequency words and wordcloud graphic of it.

we can see from the high frequency word and wordcloud graphic that love, youre and time are the most appeared words rock artists every used in the last 50 years, so I guess this kind of music expressed some kind of positive spirit in the development of music. To test my guess, I decided to do an sentimental analysis of the lyrics of rock music.

High frequency word of rock music in decade

I wanna analyze the change of rock music in the last 50 years, so I plot the high frequency word graphics to show the top 10 high frequency word of evry decade.

It can be seen from the chart that the vocabulary of top3 has not changed in every decade, while heart has appeared since the 1990s, and night vocabulary has become less since the 1990s, which is a special trend.

How rock music change in decade

Next, I want to observe the overall development of rock music in the past 50 years.

It seems like the length of rock music song had a slightly decreased in the last 50 years.

To better analyze the rock music, I am gonna count the total words used by rock music in every decade.

we can see from the above two charts that total word of rock music attach a peak in 2000s, it means this genre of music had a great development at this age, though the length of rock music song had a slightly decreased.

After some basic information of rock music showed above, I know the development of rock music which can represent the development of modern music perfectly.

Next, I wanna analyze the rock music from another perspective.

Sentiment analysis of rock music

To prove the previous speculation on the emotional expression of rock music, I will conduct customs clearance analysis on rock music to explore how the emotional expression of rock music is.

The chart shows that the score of positive emotion is relatively close to that of negative emotion, 340605 and 346829 respectively, but the score of negative emotion is slightly higher. In terms of mood, anticipation, sadness and joy are the top three.

To better understand the sentiment change of rock music, I plot sentiment culmulative graphic of every decade.

We can see from the graphic that 2000s age play a significant role in the sentiment scores calculating.

Now that we’ve worked out the total score of emotions, I’m going to figure out whether rock music has a higher positive or negative score next.

How sentiment ofrock music change in decade

This chart shows that most of the words they use in songs tend to be negative emotions. It is different from my guess, so I decide to plot the heatmap to show the emotion different of rock music in different decade.

we can see in the heatmap that though the total sentiment score of negative is slightly higher than positive, but they are similar to each other in every decade. In detail, rock music is much more negative in 1980s, but it become more positve since 1990 till now.

According to the sentiment score, I want to use bing to create a comparative word cloud of positive and negative sentiment.

this wordcloud shows that the amount of postive words and negative words are similar, positive words are love, like, right and so on; negative words are lost, hard, wrong and so on.

Summary

  1. The overall analysis shows that rock music accounts for 51.6% of the total works of all music types in the past 50 years, so rock music can be used to represent the development of music in the past 50 years.
  2. The main expressions of rock music are positive, such as “love”, which is a typical word. From the perspective of age, 2000s age is the year of the eruption of rock music works.
  3. The proportion of positive elements and negative elements in the emotional expression of rock music is roughly the same, which is very consistent with the shouting music of rock music. it often sings the inner demands of rock singers, which are diversified.